The Big Easy

Does anyone know how/why New Orleans got the name the Big Easy??

According to this:

[nitpick]
Whether or not Whack-a-Mole’s link provides accurate information as to the source of the nickname “Big Easy”, I don’t think the author knows what the word euphemism means. I think nickname, sobriquet, or epithet would be work better in the first sentence.
[/nitpick]

[No slight intended on Whack-a-Mole, of course.]

Another name for it is “The City That Care Forgot.” I can’t begin to figure that one out.

The group over at the American Dialect Society have found this name as far back as 1913. It meant a city without a care.